| 초록 |
In this work, we measured cloud points using a static type apparatus with variable volume cell to get data on the solubility of PMMA in DME. PMMA was dissolved well in the solvents in the range of 25.18 ~ 45.03MPa, and the cloud points of this were measured with the concentrations (1, 3, 5, wt%) in solvents. The solubility of PMMA was not concerned with concentrations of PMMA and exhibited LCST (lower critical solution temperature) behavior in each solvent. We also investigated the effect of CO2 on the cloud point of PMMA as adding CO2 which is non-polar into each solvent. The cloud point pressure of PMMA increased proportionally to the amount of CO2 added at the same temperature. According to this result, it was known that CO2 could be used as an anti-solvent, and the cloud point of PMMA could be controlled by changing the concentration of CO2. |
